Do Extras and Change Orders Count Toward Your Construction Lien Claim in Ontario?

Construction projects rarely go exactly as planned. A homeowner asks for a bigger deck than originally quoted, or a commercial tenant wants extra electrical outlets added mid-build. These add-ons are usually called "extras" or "change orders," and disputes over whether unpaid extras and change orders count toward a lien for extras and change orders in Ontario are common once a project ends in a payment fight.

If a contractor or subcontractor is owed money for extra work that was never part of the signed contract, a natural question is whether that unpaid amount can be added to a construction lien registered against the property. The short answer is generally yes — but how clearly the extra was documented can make or break the claim.

This article explains how extras and change orders generally fit into a lien claim under Ontario's Construction Act, what kind of documentation helps, and where these claims tend to run into trouble.

What Counts as an "Extra" or Change Order

• Extra work — work or materials supplied that were not included in the original scope of the contract.
• Change order — a documented agreement (formal or informal) to add, remove, or modify part of the original scope, usually at an adjusted price.
• Undocumented deviations — sometimes extras arise informally, through a verbal instruction on-site that nobody writes down until much later.

A common misconception is that a lien can only secure the amount stated in the original signed contract. In fact, a lien under the Construction Act generally attaches to the value of services and materials actually supplied to the improvement, not just the number on the original quote.

Why Extras Are Generally Lienable

Because the Construction Act ties a lien to the value of what was actually supplied to an improvement, unpaid extras and change orders are generally capable of being folded into a lien claim alongside the original contract balance. The lien is meant to reflect the true value delivered to the project, not simply what was agreed to on day one.

Being generally lienable doesn't mean being easy to prove, though. An unpaid extra still has to be established as genuine extra work — beyond the original scope — and properly valued, and the other side is free to dispute both points.

Where These Claims Run Into Trouble

• No written record — verbal instructions with no paper trail make it hard to prove the extra was requested, let alone at what price.
• Scope disputes — the owner may argue the "extra" was actually part of the original contract's scope all along.
• Timing — extras completed near the end of a project can complicate figuring out when the lien clock starts running.
• Valuation disagreements — even when both sides agree extra work happened, they may disagree sharply on what it was worth.

Protecting Your Right to Lien for Extras

• [ ] Get change orders in writing whenever possible, even a brief confirming email.
• [ ] Keep dated notes of verbal instructions if a written change order isn't practical in the moment.
• [ ] Track extras separately from the base contract so the value of each is clear.
• [ ] Invoice for extras promptly rather than folding everything into one final bill.
• [ ] Watch the clock — Ontario's lien preservation and perfection deadlines are short and strict, and they don't pause while you sort out paperwork.

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